Hello Alinafe. Yes, you can correct those issues by unconnecting that node. Key G on the keyboard when selected. Just move the node a bit aside.
When you think it is helpful, 
there is an inline validation tool which shows direct during mapping if you make certain errors
Download here
https://github.com/osmlab/appledata/archive/josm_paint_inline_validation.zip
If installed, you can find it under the tab Map Paint styles. : inline validation.
Best regards
 
Best regards


