Project Manager 也好, Programmer 也好, 只要不长钱, 爱叫啥叫啥,全一样.
When you need find a job later, you put Project Manager on your resume for your current job if you want to looking for a Project Manager job, if you want to find a Programmer job, you put your current title as Programmer, nobody care it.
Not sure whay you worry about.