"First impressions are lasting" means that the initial impression someone has of you tends to stick with them and influence their subsequent perception of you, even if later interactions prove those initial impressions wrong.
"First impression is last" suggests that the initial impression is the only one that matters and that you have no opportunity to change someone's mind after that first encounter. This is not accurate.
Here's why the saying is misleading:
* People are capable of changing their opinions: Even if you make a bad first impression, you can still work to build a positive relationship through subsequent interactions.
* Context matters: First impressions are influenced by the context of the meeting. A bad first impression at a job interview might not necessarily be a deal-breaker if you impress during the interview itself.
* People change: People's personalities, behaviors, and attitudes can evolve over time, and this can change how someone is perceived.
While first impressions are important, they are not set in stone. You can always work to make a good impression, even after a less-than-ideal first encounter.