Redirecting With Flashed Session Data returns flashed session TWICE

This is annoying me. I'm successfully redirecting and flashing a status message, but it appears AGAIN if I click on another page. The next page click or redirect the session has cleared. I don't want this message to show up twice.

My controller

if($saved)
        {
            return redirect('/dashboard/school-year')
                ->with('toastr', 'Success!')
                ->with('success', 'New school year created.');
        } else {
            return redirect('/dashboard/school-year')
                ->with('toastr', 'Error!')
                ->with('error', 'Hmmm... there was some type of error with this.');
        }

my blade:

@if(session('toastr'))
    @if(session('success'))
        {{ \Toastr::success(session('success'), session('toastr'), $options = []) }}
    @elseif(session('error'))
        {{ \Toastr::error(session('error'), session('toastr'), $options = []) }}
    @elseif(session('warning'))
        {{ \Toastr::error(session('warning'), session('toastr'), $options = []) }}
    @elseif(session('info'))
        {{ \Toastr::error(session('info'), session('toastr'), $options = []) }}
    @endif
@endif

Again, it's working properly, it just shows twice (going to another page) before it's removed.