Just imported a score from Musescore via XML.
The guitar part which was Score and TAB is somehow doubled and bracketed completely. I do not know how to get rid of the extra staves. Also, it has named the guitar Acoustic guitar in C, despite all the names in Setup showing otherwise normal acoustic guitar.
When I first imported it showed two staves of TAB. I then went to setup and the selection TAB only was checked, selected both Notation and TAB - and then got the doubled staves.