Yes, when going through your suggested timesheet, you will often see different suggestions from different activities that belong to the same Matter. For example, a calendar meeting and a follow up email regarding that meeting.
In order to make more agile the time registration and also, to simplify the invoices for your clients, you can select multiple entries to combine them into a single confirmed entry.
To do so, simply click on the different suggested entries that you'd like to combine, and you will see the times of those entries summed up in the entry details (e.g.: If you select the Meeting (45 mins) and the Email (6 mins), the confirmed entry will be of 51 minutes.
Please, note that, as you can see in the example, the details of the entry (Matter, Activity, Description...) will be only of the first suggestion that you selected, and not from both entries combined.