Learn Hardcore Arabic (Egyptian): الزميلة افتكرت الموعد، بس انا افتكرته الصبح. - The female coworker remembered the appointment, but I remembered it in the morning.

In Egyptian Arabic, the definite article ال is usually pronounced el-. But before a sun letter, the l sound assimilates to the next consonant.

Since ز is a sun letter:

الزميلة is pronounced something like ez-zamīla
but it is still spelled الزميلة

This is a very normal Arabic spelling/pronunciation pattern.

Why does افتكرت seem to mean both she remembered and I remembered?

In normal Arabic spelling, افتكرت can represent both:

she remembered
I remembered

Context tells you which one is meant.

Here:

الزميلة افتكرت = the female colleague remembered
أنا افتكرته = I remembered it

Also, in actual speech, the pronunciation can differ a bit, but in everyday writing they often look the same.

Why is included if the verb already tells us the subject?