diff --git a/BUGS.md b/BUGS.md
index 9ce963e..639e50a 100644
--- a/BUGS.md
+++ b/BUGS.md
@@ -1,9 +1,9 @@
 
 # BUGS
 
+- on start topic, logs show questionhandler.get() twice.
 - generators e correct scripts que durem muito tempo podem bloquear o loop do tornado?
 - detect questions in questions.yaml without ref -> error ou generate default.
-- topicos virtuais nao deveriam aparecer. na construção da árvore os sucessores seriam ligados directamente aos predecessores.
 - Criar outra estrutura organizada em capítulos (conjuntos de tópicos). Permitir capítulos de capítulos, etc. talvez usar grafos de grafos...
 - session management. close after inactive time.
 - generators not working: bcrypt (ver blog)
@@ -11,6 +11,7 @@
 
 # TODO
 
+- radio e checkboxes, aceitar numeros como seleccao das opcoes.
 - each topic only loads a sample of K questions (max) in random order.
 - servir imagens/ficheiros.
 - pertuntas tipo tristate: (sim, não, não sei
diff --git a/knowledge.py b/knowledge.py
index 28d32c9..2399ce2 100644
--- a/knowledge.py
+++ b/knowledge.py
@@ -54,7 +54,7 @@ class StudentKnowledge(object):
     def unlock_topics(self):
         # minimum level that the dependencies of a topic must have
         # for the topic to be unlocked.
-        min_level = 0.2
+        min_level = 0.01
 
         for topic in self.topic_sequence:
             if topic not in self.state:  # if locked
@@ -89,8 +89,9 @@ class StudentKnowledge(object):
         factory = self.deps.node[topic]['factory']
         questionlist = self.deps.node[topic]['questions']
 
-        self.questions = [factory[qref].generate() for qref in questionlist]
         self.finished_questions = []
+        self.questions = [factory[qref].generate() for qref in questionlist]
+        logger.debug(f'Total: {len(self.questions)} questions')
 
         try:
             self.current_question = self.questions.pop(0)  # FIXME crash if empty
diff --git a/learnapp.py b/learnapp.py
index 9ed8e6a..03c3414 100644
--- a/learnapp.py
+++ b/learnapp.py
@@ -58,6 +58,8 @@ class LearnApp(object):
             if bcrypt.checkpw(pw.encode('utf-8'), student.password):
                 if uid in self.online:
                     logger.warning(f'User "{uid}" already logged in, overwriting state')
+                else:
+                    logger.info(f'User "{uid}" logged in successfully')
 
                 tt = s.query(StudentTopic).filter(StudentTopic.student_id == uid)
                 state = {t.topic_id:
@@ -71,7 +73,6 @@ class LearnApp(object):
                     'name': student.name,
                     'state': StudentKnowledge(self.deps, state=state)
                 }
-                logger.info(f'User "{uid}" logged in successfully')
                 return True
 
             else:
diff --git a/static/css/topic.css b/static/css/topic.css
index ef7e5f9..79467bc 100644
--- a/static/css/topic.css
+++ b/static/css/topic.css
@@ -1,20 +1,20 @@
 .progress {
     /*position: fixed;*/
     top: 0;
-    height: 90px;
+    height: 85px;
     border-radius: 0px;
 }
 body {
     margin: 0;
     padding-top: 0px;
-    margin-bottom: 90px; /* Margin bottom by footer height */
+    margin-bottom: 120px; /* Margin bottom by footer height */
 }
 
 .footer {
     position: absolute;
     bottom: 0;
     width: 100%;
-    height: 70px;
+    height: 90px;
     line-height: 60px;
     /*background-color: #f5f5f5;*/
 }
--
libgit2 0.21.2