An issue with keybindings

[TouchandFeel]

This is to be expected in such a situation. Most macroing software doesn't register something like say "ctrl+1" as a singular instantaneous input but as the modifier then the key-value input, since the modifier is actually setting a state which needs to be in place for the alternate version of the "1" or whatever key-value to register as such. If you then hit another key at the same time as the macroed key, like say "3" at the same time, you can occasionally confuse the software by interrupting the modifier macro with the other keypress resulting in the software registering the modifier and the other key as the intended input. For example, press a key macroed with "ctrl+1" at the same time as the "3" key, you may just end up with "ctrl+3" being registered.
If you use such macros pretty extensively, the only way to truly avoid this potentially happening is to try to not mash multiple buttons at the same time.